Abstract:
The invention discloses a method for determining a starting time for a flash emitted from a flash tube (1 ) of a flash apparatus (200). The flash apparatus (200) comprises a triggering circuit (10), and a drive circuit (20). The method comprises the steps of measuring an electric current through and/or a voltage across an electrical component (3) of the drive circuit (20), and determining the starting time for the flash based on the measured electric current and/or voltage.
Abstract:
The present invention relates to the field of flash tubes for photographic use, in particular to a flash tube adapted to provide a light output adapted to FP-sync, Flat Peak. The flash tube comprises a length of glass tubing 42 enclosing a gas 43 for use in the flash tube 41, a cathode 44 inside a first end part 46 of glass tubing 42 and an anode 44 inside a second end part 47 of glass tubing 42. The cathode 44 comprises an element 50 that helps to ionize the gas 43 that is wound around the cathode 44, such that a spark stream starts from the upper part 48 of the cathode 44 and is prevented from spreading down wards on the cathode 44 and changing the arc length during the light output adapted to FP-sync.
Abstract:
The present invention generally relates to the field of communication between electronic devices used for photography. In particular, the invention relates to a method, transmission unit, system and computer program for wireless communication between a camera and at least one remote flash device, such as photoflash units and related equipment. More in particular, the invention provides a way of controlling a plurality of flash devices from an intermediate radio transmission unit mountable on the camera, andutilized a delay a sequence flash control sequence so as to synchronize the function of the camera and the remote flash devices during image acquisition. Further the invention provides a way of controlling in the photoflash unitssettings for the main flash, wherein the setting are the last settings determined by the camera when the intermediate radio transmission unit was in a TTL-mode.
Abstract:
The present invention relates to a driver circuit for a flash tube. The driver circuit comprises a first and a second output for an electronic flash tube, a capacitor, an inductor and a switch. The inductor and the switch being connected in series with the first and a second output across the capacitor. A component which only allows current flow in one direction connected across the first and the second output and the inductor, with a polarity opposite to a direction of energy supply from the capacitor to the first output. The driver circuit further comprises a controller for controlling the switch. The controller comprises receiving means for receiving parameters related to desired flash characteristics. The controller being configured to control said switch based on said parameters to obtain said desired flash characteristics.
Abstract:
This disclosure relates to a reflector for use in a lighting head arranged to be detachably connected to the lighting head. This disclosure also relates to a fastening fixture for a lighting head arranged to detachably connect a reflector to the lighting head and a lighting head being arranged to detachably connect a reflector to the lighting head. Fig.
Abstract:
A flash apparatus comprising at least two flash tubes and at least two energy storage units is presented, wherein each of said at least two energy storage units is being arranged to be configured to strictly correspond to one of the at least two flash tubes for a flash. The flash apparatus is configured to control the amount of energy provided by the at least two energy storage unit(s) to their corresponding flash tube and control the flash duration of the corresponding flash tube dependent of each other, respectively for each flash tube, so as to obtain substantially the same colour temperature from each flash tube for a flash. A method and a computer program product for use in the flash apparatus are also presented.
Abstract:
Blitzgerätesystem (1) für fotografische Zwecke, umfassend:- einen Blitzhalter (20) mit einem darin ausgebildeten Batterieaufnahmehohlraum (25);- ein auf dem Blitzhalter (20) gelenkig angebrachtes Blitzgehäuse (2); und- eine Batterie (30), dadurch gekennzeichnet, dass der Batterieaufnahmehohlraum (25) umfasst:- elektrische Zugriffskontakte (26a, 26b);- ein vorstehendes Batterieverriegelungselement (27); und- einen Batterieverriegelungshohlraum (28),wobei das vorstehende Batterieverriegelungselement (27) und der Batterieverriegelungshohlraum (28) an entgegengesetzten inneren Seitenwände des Batterieaufnahmehohlraums (25) angeordnet sind und,wobei die Batterie (30) umfasst:- elektrische Kontakte (36a, 36b) zum Eingriff mit den elektrischen Zugangskontakten (26a, 26b) in dem Batterieaufnahmehohlraum (25);- ein vorstehendes Hohlraumverriegelungselement (37) und ein Hohlraumverriegelungshohlraum (38) zum Eingriff mit dem entsprechenden vorstehenden Batterieverriegelungselement (27) und dem Batterieverriegelungshohlraum (28) in dem Batterieaufnahmehohlraum (25).